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      <marc:subfield code="a">A review of rate coefficients and constants used in nutrient and dissolved oxygen models for the Peace, Athabasca and Slave River basins / </marc:subfield>
      <marc:subfield code="c">prepared for the Northern River Basins Study under project 2612-B7 by R.D. Shaw and G. MacDonald, Environmental Management Associates.</marc:subfield>
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